94 THE SUPERIOR EXTREMITY 



metacarpo-phalangeal joint is primarily due to the causative 



FJG. 33. The Hand of a Child of three, showing Tuberculous Dactylitis. 

 The first metacarpal and the proximal phalanx of the index finger are 

 affected by the disease. Note the stage of ossification of the carpus and 

 metacarpus. 



force, and is maintained by the abductor pollicis brevis, whose 



